Professor Ursula Martin CBE of the University of Oxford gave a presentation on the scientific life of Ada Lovelace which is provided below for downloading.
As seemed obvious from the discussion afterwards, it was very well received, and provided an extremely interesting insight into the life and times of Ada Lovelace.
The digitisation of the papers referred to in the presentation is at http://www.claymath.org/publications/ada-lovelaces-mathematical-papers
A recent article written by Professor Martin can be found at http://www.the-tls.co.uk/articles/public/ada-lovelaces-abstract-machine/
Finally, Professor Martin has indicated that she would love to see BCS Oxfordshire members at their celebration of the 100th anniversary of the birth of Christopher Strachey. More information can be found at http://www.cs.ox.ac.uk/strachey100/